A roughness value can either be calculated on a profile (line) or on a surface ( area). The profile roughness parameter ( Ra , Rq,) are more common. The area roughness parameters (Sa, Sq,) give more significant values. RA and RMS describes micro-finishes that can improve seals, lower friction, reduce real surface area, allow for easier sanitation and more. Weiteres Bild melden Melde das anstößige Bild.
Roughness affects various part characteristics, including the amount of wear, the ability to form a seal when the part makes contact with something, and the ability to coat the part.
Material component of the profile Rmr(c) for guide surfaces and sealing surfaces moving against one another. The arithmetical mean roughness value Ra is hardly affected by individual . Surface Roughness Conversion Charts and Tables, definitions and data. Definitions and indications for surface roughness parameters(for industrial products)are specified. They are arithmetical mean roughness( Ra ), maximum height(Ry), ten-point mean roughness(Rz), mean spacing of profile irregularities( Sm), mean spacing of local peaks of the profile(S) and profile bearing length ratio (tp). Ra -Rz surface roughness measurement.